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17 Mar 2010 08:41:18 IST

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what is pseudo force...? How to apply it on a system?

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what is pseudo force...? How to apply it on a system?

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Blazing goIITian

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17 Mar 2010 09:58:02 IST

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When we analyse situations on earth, we normally do so in inertial frames i.e. a frame that doesn't have an acceleration of its own...............In such a case, our analysis gives us perfect results and the FBDs that we draw donot need manipulation for them to be concurrent with Newton's laws......................

However, when we analyse from a frame that is non-inertial(having its own acceleration), u'll get results that are not concurrent with Newton's laws of motion..............Ur perception of motion in a non-inertial frame can be justified by Newton's laws only if u manipulate the FBD by adding an extra force that acts opposite to the direction of the frame's acceleration and is equal to: Mass of the body of which the FBD is being drawn * acceleration of the frame.........

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Blazing goIITian

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17 Mar 2010 09:59:15 IST

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The extra force doesn't have a real existence and hence, is called a PSEUDO FORCE...........

saharsha kumar keshkar

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17 Mar 2010 10:13:25 IST

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ahttp://www.goiit.com/posts/show/813297/newtons-laws-of-motion-concept-of-pseudo-force-804174.htm

silent killer

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17 Mar 2010 17:20:03 IST

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hi..

a pseudo force is nothing but a force which is needed to be taken while working problems in non inertial frame.

ok,what is non inertial frame?

it is the frame which is accelerated.

for eg.u are standing inside a lift which is going upward with an acceleration "a".

when u measure ur weight it will not show the actual weight. u get ur answer wrong if u simply say my weight is mg inside the lift.

Lift is a non inertial frame.so u need to apply a pseudo force opposite to the direction of acceleration.

ie,ma downward.u must say that ur wt is m(a+g) which is shown by the machine.

2.another interesting eg is that ,when u are standing inside a bus ,u may experiance a sudden jerk backward when the driver starts the vehicle .why is it so?no one is pushing u backwards .it is only the pseudo force which

did this job.

i thing u have got a clear picture of what a pseudo force is.

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